DNVGL-CP-0098
Edition March 2016
The electronic pdf version of this document, available free of charge from http://www.dnvgl.com, is the officially binding version.

DNV GL class programmes contain procedural and technical requirements including acceptance criteria for obtaining and retaining certificates for objects and organisations related to classification.
© DNV GL AS March 2016
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Class programme — DNVGL-CP-0098. Edition March 2016
Plywood
DNV GL AS
Page 3

Changes - current...................................................................................................3
Section 1 General.................................................................................................... 5
1 Introduction.........................................................................................5
2 References........................................................................................... 6
3 Documentation.....................................................................................6
Section 2 General Requirements............................................................................. 8
1 Design requirements............................................................................8
2 Requirements to production and quality control arrangement............. 8
3 Requirements to material.................................................................... 8
4 Requirements to marking of product................................................. 10
Changes – historic................................................................................................ 11
Class programme — DNVGL-CP-0098. Edition March 2016
Plywood
DNV GL AS
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The objective of this class programme (CP) is to describe the type approval (TA) scheme for plywood.
The general requirements for obtaining DNV GL type approval certificate is given in class programme DNVGL
CP 0338 , DNV GL type approval scheme .
The procedures and requirements described in this CP are applicable for obtaining TA certificate based on requirements given by the Society's rules and standards, e.g. RU SHIP Pt.2 Ch.3
.
Guidance note:
This class programme is not applicable for obtaining EU Marine Equipment Directive (MED) certificates. Visit www.dnvgl.com
for information on MED certification.
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This CP gives a description of the procedures and requirements related to documentation, design and type testing applicable for TA of plywood.
This CP does not set the design requirements to the plywood. TA is based on compliance with design requirements given in the DNV GL rules and/or other regulations and standards. The CP describes how to document compliance with the requirements in order to obtain a TA certificate for the material. This includes, where relevant, technical requirements for how the type tests shall be performed.
The Society's type approval certificate will cover one quality grade of the actual product with the possibility to include variants.
For plywood this means:
— Grade : one type of wood, from a defined geographical area
— variants : different numbers of plies, i.e. construction, are considered as variants
.
The Society's type approval certificate is normally limited to one manufacturer at one production site, however, other arrangements may be agreed upon with the Society.
Type tests as specified in Sec.2 [3] , shall be carried out and verified in one of the following ways:
— at a DNV GL laboratory
— at a recognized and independent laboratory or a laboratory accepted by DNV GL
— at the manufacturer’s premises in the presence of a surveyor.
DNV GL rules RU SHIP Pt.2 Ch.3
require that plywood is type approved in accordance with this CP for materials to be installed on classed vessels.
A TA certificate in accordance with this CP will confirm compliance with the requirements in the DNV GL rules as specified in [1.1] .The TA certificate will not confirm compliance with requirements in other parts of the rules. In case additional requirements in other parts of the rules shall be covered by the TA certificate, this shall be specified in the application for TA and will be stated in the TA certificate.
Page 5 Class programme — DNVGL-CP-0098. Edition March 2016
Plywood
DNV GL AS

Standards referred to in this document:
— ISO 9001:2008, Quality management systems – Requirements
— ISO 1096, Plywood - Classification
— ISO 1097, Plywood - Measurement of Dimensions of Panels
— ISO 1098, Veneer Plywood for General Use - General Requirements
— ISO 2074, Plywood - Vocabulary
— ISO 2426, Plywood - Veneer Plywood with Rotary Cut Veneer for General Use - General Rules for
Classification by Appearance
— ISO 9424, Wood-based panels - Determination of Dimensions of Test Pieces
— ISO 9425, Wood-based panels - Determination of Moisture Content
— ISO 9427, Wood-based panels - Determination of Density
— SFS 2290, Plywood vocabulary
— SFS 2411, Plywood classification
— SFS 2413, Quality requirements for appearance of plywood with outer plies of birch
— SFS 2414, Plywood - Measurements of dimensions of panels
— SFS 2416, Testing of the Characteristics of Birch Plywood
— SFS 2417, Permissible Stresses and Moduli of Elasticity of Exterior Birch Plywood
— SFS 2426, Plywood - veneer plywood with rotary cut veneer for general use - classification by appearance
— SFS 4091, Finnish birch faced plywood
— SFS 4092, Finnish conifer plywood
— SFS 4093, Dimensions and tolerances of Finnish construction plywoods
— BS 1203, Specification for synthetic resin adhesives (phenolic and aminoplastic) for plywood .
— BS 6566, Plywood
— IMO FTPC, Test for surface flammability (App.1, Part 5)
— DIN 4102 - Part 1, B2 (1998), Reaction to fire tests - Ignitability of building products subjected to direct impingement of flame .
— EN ISO 11925-2:2010, Reaction to fire tests -- Ignitability of products subjected to direct impingement of flame -- Part 2: Single-flame source test
— “Handbook of Finnish Plywood, Blockboard and Laminboard” CI/SfB Ri4, April 1984. Technical Publication
No. 25, 2nd issue, No. 2.
For TA of plywood the following additional documentation shall be submitted by the manufacturer at initial type approval, and updated at renewal (general documentation requirements are given by DNVGL CP 0338 ).
The documentation shall, to the extent possible, be submitted as electronic files. The manufacturer shall keep one (1) copy of type approval documentation in their own file. The documentation that forms the basis for the TA shall be easily available for surveyors at the TA applicant’s premises. When documentation is submitted in paper format, normally two copies of the documentation shall be submitted to the Society. No documentation will be returned to the company applying for TA.
Please number documentation according to below list to facilitate review:
1) type designation, i.e. product name (grade) with list of variants to be included in and stated on the type approval certificate
2) basis for approval. A reference to applicable rules and standards, see Sec.2 [1] , which the product is to comply with
3) product specification and description, and data sheets for all variants. The product information shall be sufficiently detailed to enable a classification according to ISO 1096 or equivalent standard by at least:
— constitution (veneer, core or composite)
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DNV GL AS

— type of gluing (for exterior or interior use)
— species of wood of the plies
— relevant properties
— use.
4) field of application and special limitations of the product (application procedure and required surface treatment prior to lamination, compatibility/non-compatibility with other materials, etc.)
5) product specification, including data sheets (TDS and MSDS) for all variants
6) description of production processes, including standard operating procedure (SOP) 1
7) description of quality assurance system or copy of ISO 9001 certificate
8) quality plan for material intended to be installed on board ships
1
9) test results (from tests already carried out) with references to standards, methods etc.
10) information regarding marking of the product or packaging
1
11) any relevant certificates with their issue number and/or date (e.g. quality management system certificate)
12) list of test and measuring equipment, including calibration certificates
2
13) in-service experience, if available
14) witnessed type test results and initial assessment report by the Society's local office shall be submitted when completed.
1
2 to be verified by surveyor during type testing to be verified by initial assessment prior to issuance of type approval certificate
Class programme — DNVGL-CP-0098. Edition March 2016
Plywood
DNV GL AS
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The plywood shall comply with the relevant requirements of RU SHIP Pt.2 Ch.3
.
The manufacturer should have a quality system that meets ISO 9001 standards, or equivalent. If this quality standard is not fulfilled, the extent of type testing and assessments will be specially considered.
The quality control arrangement in production will particularly be checked with respect to:
— control of incoming materials
— scope of quality control, i.e. proof that test methods, test quantity and test equipment complies to the applicable standard EN or ISO
— traceability and marking system
— production records
— storage condition and procedure.
The results of the type testing shall be in conformance with the manufacturer's specifications for the product, which in turn shall be in conformance with the requirements stated or referred to in the below Table 1 and
Table 2 .
Combustible materials are accepted for some ship applications, provided low ignitability and low flame spread properties are documented. If relevant and adequate documentation has been received, this will be stated on the type approval certificate.
Test reports shall contain references to test procedures and complete records of test results.
The following shall be reported in the type testing report:
Bending strength, modulus of elasticity, shear strength of glue joint, density, thickness and number of plies.
See Table 1 for requirements to veneer plywoods.
Class programme — DNVGL-CP-0098. Edition March 2016
Plywood
DNV GL AS
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Table 1 Requirements for veneer plywoods.
Number of plies
Property
Plywood classification
General requirements
Moisture content of final product at factory
Measurement of dimensions
Dimensions and tolerances
Dimensions of test pieces
Density
Vocabulary/terminology of plywoods
Test method/Test procedure
1)
ISO 1096
SFS 2411
ISO 1098
SFS 2412
ISO 1098/
ISO 9425
-
ISO 1097
SFS 2414
SFS 4093
ISO 9424
ISO 9427
ISO 2074
SFS 2290
BS 1203/
SFS 2416
Requirements
-
See ISO 1098
SFS 2412
6-14%
≥ 5
See ISO 1097
SFS 2414
See SFS 4093
See ISO 9424
Manufacturer's specification
-
2)
Shear strength of glued joint
Bending strength
Modulus of elasticity
SFS 2416
SFS 2416
See BS 1203
SFS 2416
3)
See SFS 4091, 4092 and SFS 2417
3)
See SFS 4091, 4092 and SFS 2417
3)
Fire properties;
-Ignitability
-Surface flammability
Appearance, general classification
Appearance, outer plies of birch
Permissible stress, guidance values for birch plywood
Properties, general
DIN 4102.1 B2 or equivalent
(e.g. EN ISO 11925-2)
IMO FTPC, App.1, Part 5
ISO 2426
SFS 2413
SFS 2417
Fire Class B2.
Low ignitability and
Low Flame Spread
See ISO 2426
See SFS 2413
See SFS 2417
3)
3)
BS 6566 See BS 6566
3)
1) Other standards may be agreed upon with the Society prior to testing
2) for Finnish plywoods, SFS standards are governing in case of discrepancy with ISO standard. For plywoods from other countries, ISO standards are the governing standard
3) these standards are complied with only when stated on the type approval certificate
The following shall be reported in the type testing report:
— bending strength
— density
Page 9 Class programme — DNVGL-CP-0098. Edition March 2016
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DNV GL AS

— thickness
— number of plies
— plus any relevant testing proposed by the manufacturer.
See Table 2 for requirements to core and composite plywoods.
Table 2 Requirements for core and composite plywoods.
Property
Plywood classification
Measurement of dimensions
Number of plies
Accuracy of thickness
Density
Vocabulary
Test method/Test procedure
1)
ISO 1096
ISO 1098
-
ISO 9424
ISO 9427
ISO 2074
Modulus of elasticity (guidance)
Permissible stress in bending
(guidance)
SFS 2416
SFS2416/2417
Gluing BS 1203
1) Other standards may be agreed upon with the Society prior to testing
Requirements
-
-
≥ 3
0.05
Manufacturer's nominal value
-
See “Handbook of Finnish Plywood,
Blockboard and Laminboard” CI/
SfB Ri4, April 1984. Technical
Publication No. 25, 2nd issue, No. 2.
See BS 1203
The product or package shall be marked. The marking shall at least include the following information:
— manufacturer’s name and address or trade mark
— production plant
— product name (grade)
— storage instruction
— production date/batch number
— quality guarantee period, if any
The marking shall be carried out in such a way that it is visible, legible and indelible. The marking of product shall enable traceability to the type approval certificate.
Class programme — DNVGL-CP-0098. Edition March 2016
Plywood
DNV GL AS
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There are currently no historical changes for this document.
Class programme — DNVGL-CP-0098. Edition March 2016
Plywood
DNV GL AS
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